My Eco 80 is once again giving me trouble (curse the previous owner who had it fitted), it lights, waits 6 or 7 seconds then goes out again, waits another 30 seconds or so and tries again, same thing, and so on to infinity I assume. Following the fault finding guide in the manual I checked the flame sensing electrodes, they seem fine, but I cleaned the tarnish off just in case, checked the sensor current with a multimeter and got 4-5uA and the manual says approximately 1uA should be present so I assume this is ok. The manual then says change PCB, so at enormous expense I have done that, no difference. I'm at a bit of loss as to what to do next, my only thoughts are the modulating gas valve, does it light on a low pressure, and then once its happy it has a flame close that valve and open another to switch up to a high pressure? Any other possibilities? I have checked the resistance of the temperature sensor and it is approximately the 11k the manual dictates.
- posted
16 years ago